/**
 * 功能：定义标准资源在新建、详情和编辑页面中的字段能力与动态编辑限制。
 * 版本：v1.0.0
 */
import type { ResourceField, ResourceUiDefinition } from './resources';

export type RecordPageMode = 'create' | 'detail' | 'edit';
export type ResourceRow = Record<string, unknown>;

export type ResourcePageContext = {
  role: string;
  accountIdentity: string;
};

type ResourcePageRule = {
  createHiddenKeys?: string[];
  editKeys: string[];
  editOptionalKeys?: string[];
  editSubmitOnlyKeys?: string[];
  accountSummary?: boolean;
};

/** 每个可编辑资源都显式声明更新字段，禁止把创建字段直接提交给更新接口。 */
const pageRules: Record<string, ResourcePageRule> = {
  gas_basic: {
    editKeys: [
      'name',
      'credit_code',
      'principal',
      'address',
      'longitude',
      'latitude',
    ],
  },
  gas_account: {
    editKeys: ['display_name', 'gas_basic_identity'],
    accountSummary: true,
  },
  delivery_basic: {
    editKeys: ['name', 'gas_basic_identity', 'principal', 'address'],
  },
  delivery_account: {
    editKeys: ['display_name', 'delivery_basic_identity'],
    accountSummary: true,
  },
  staff_account: {
    editKeys: [
      'name',
      'phone',
      'avatar',
      'role_code',
      'gas_basic_identity',
      'delivery_basic_identity',
      'work_status',
    ],
    accountSummary: true,
  },
  staff_credential: {
    editKeys: ['credential_type', 'credential_no', 'expired_at'],
    editSubmitOnlyKeys: ['staff_account_identity'],
  },
  user_account: {
    editKeys: ['name', 'phone', 'avatar', 'real_name'],
    accountSummary: true,
  },
  user_address: {
    editKeys: ['address', 'longitude', 'latitude', 'is_default'],
    editSubmitOnlyKeys: ['user_account_identity'],
  },
  user_service_relation: {
    editKeys: [
      'gas_basic_identity',
      'delivery_basic_identity',
      'staff_account_identity',
    ],
    editSubmitOnlyKeys: ['user_account_identity'],
  },
  producer_account: {
    editKeys: [
      'name',
      'credit_code',
      'principal',
      'phone',
      'address',
      'password',
      'display_name',
      'remark',
    ],
    editOptionalKeys: ['password'],
    accountSummary: true,
  },
  product_type: { editKeys: ['code', 'name'] },
  product_warehouse: {
    editKeys: ['code', 'name', 'address', 'manager', 'phone'],
  },
  product_info: {
    editKeys: [
      'name',
      'producer_account_identity',
      'product_type_identity',
      'params',
      'produced_at',
    ],
  },
  product_repair: {
    editKeys: [
      'repair_no',
      'repair_type',
      'started_at',
      'completed_at',
      'result',
      'target_product_status',
      'content',
      'operator',
      'remark',
    ],
    editSubmitOnlyKeys: ['product_info_identity'],
  },
  gasorder_contract: {
    editKeys: [
      'delivery_basic_identity',
      'title',
      'terms',
      'file_uri',
      'default_delivery_fee',
      'signed_at',
      'effective_at',
      'expired_at',
    ],
  },
  ec_product: {
    editKeys: [
      'ec_category_identity',
      'product_code',
      'name',
      'price_amount',
      'stock_quantity',
    ],
  },
  ec_product_attribute: {
    editKeys: ['ec_product_identity', 'name', 'value', 'sort_no'],
  },
  ec_product_image: {
    editKeys: ['ec_product_identity', 'image_uri', 'sort_no', 'is_cover'],
  },
  fin_settlement: {
    editKeys: [
      'settlement_no',
      'subject_type',
      'subject_identity',
      'period_start',
      'period_end',
    ],
  },
  cms_content: {
    editKeys: ['content_type', 'title', 'body', 'version_no', 'publish_status'],
  },
  cs_ticket: {
    editKeys: ['user_account_identity', 'ticket_no', 'category', 'priority'],
  },
  platform_account: {
    editKeys: ['display_name', 'avatar', 'platform_role_code', 'phone'],
    accountSummary: true,
  },
  platform_role: { editKeys: ['name', 'location_scope'] },
};

const ownerKeys: Record<string, string[]> = {
  staff_credential: ['staff_account_identity'],
  user_address: ['user_account_identity'],
  user_service_relation: ['user_account_identity'],
  product_info: [
    'warehouse_identity',
    'gas_basic_identity',
    'delivery_basic_identity',
    'user_account_identity',
  ],
  product_repair: ['product_info_identity'],
  gasorder_contract: ['user_account_identity', 'gas_basic_identity'],
};

/** 返回当前模式需要展示的字段；编辑页会保留不可变字段但将其设为只读。 */
export function pageFields(
  definition: ResourceUiDefinition,
  mode: Exclude<RecordPageMode, 'detail'>,
  row: ResourceRow,
  context: ResourcePageContext,
) {
  const rule = pageRules[definition.name];
  if (mode === 'create') {
    const hidden = new Set(rule?.createHiddenKeys ?? []);
    return definition.fields.filter((field) => !hidden.has(field.key));
  }
  let editableKeys =
    rule?.editKeys ?? definition.fields.map((field) => field.key);
  if (definition.name === 'product_repair' && row.result !== 'pending') {
    editableKeys = ['remark'];
  }
  if (definition.name === 'platform_account' && context.role !== 'root') {
    editableKeys = editableKeys.filter((key) => key !== 'platform_role_code');
  }
  const visibleKeys = new Set([
    ...editableKeys,
    ...(ownerKeys[definition.name] ?? []),
    ...definition.fields
      .filter((field) =>
        [
          'username',
          'code',
          'delivery_code',
          'producer_code',
          'contract_no',
          'role_code',
        ].includes(field.key),
      )
      .map((field) => field.key),
  ]);
  return definition.fields.filter(
    (field) =>
      visibleKeys.has(field.key) &&
      (field.type !== 'password' || editableKeys.includes(field.key)),
  );
}

/** 返回编辑请求允许提交的字段。 */
export function editableFields(
  definition: ResourceUiDefinition,
  row: ResourceRow,
  context: ResourcePageContext,
): ResourceField[] {
  const rule = pageRules[definition.name];
  let keys = rule?.editKeys ?? definition.fields.map((field) => field.key);
  if (definition.name === 'product_repair' && row.result !== 'pending')
    keys = ['remark'];
  if (definition.name === 'platform_account' && context.role !== 'root') {
    keys = keys.filter((key) => key !== 'platform_role_code');
  }
  const allowed = new Set(keys);
  return definition.fields.filter((field) => allowed.has(field.key));
}

/** 返回更新协议需要提交的字段，其中只读归属字段仅原样回传。 */
export function updatePayloadFields(
  definition: ResourceUiDefinition,
  row: ResourceRow,
  context: ResourcePageContext,
) {
  const keys = new Set([
    ...editableFields(definition, row, context).map((field) => field.key),
    ...(pageRules[definition.name]?.editSubmitOnlyKeys ?? []),
  ]);
  return definition.fields.filter((field) => keys.has(field.key));
}

/** 判断编辑字段在当前模式是否必填。 */
export function fieldRequired(
  definition: ResourceUiDefinition,
  field: ResourceField,
  mode: Exclude<RecordPageMode, 'detail'>,
) {
  if (mode === 'create') return Boolean(field.required);
  const optional = new Set(pageRules[definition.name]?.editOptionalKeys ?? []);
  return Boolean(field.required && !optional.has(field.key));
}

/** 判断资源是否使用账户头像与账号摘要。 */
export function usesAccountSummary(definition: ResourceUiDefinition) {
  return Boolean(pageRules[definition.name]?.accountSummary);
}

/** 返回直达新建页时的阻止原因，空字符串代表允许新建。 */
export function createBlockedReason(
  definition: ResourceUiDefinition,
  context: ResourcePageContext,
) {
  if (!definition.canCreate) return '当前资源不支持新建';
  if (
    ['platform_account', 'platform_role'].includes(definition.name) &&
    context.role !== 'root'
  ) {
    return '只有 root 可以新建平台账户或平台角色';
  }
  return '';
}

/** 返回直达编辑页时的阻止原因，空字符串代表允许编辑。 */
export function editBlockedReason(
  definition: ResourceUiDefinition,
  row: ResourceRow,
  context: ResourcePageContext,
) {
  if (!definition.canEdit) return '当前资源不支持编辑';
  if (definition.name === 'gasorder_contract') {
    if (Number(row.contract_status) !== 0)
      return '只有草稿状态的合同可以编辑';
    if (![0, 1].includes(Number(row.status)))
      return '停用、已归档或已冻结的合同不可编辑';
  }
  if (definition.name === 'platform_role') {
    if (context.role !== 'root') return '只有 root 可以编辑平台角色';
    if (row.is_system === true) return '系统角色不允许编辑';
  }
  if (
    definition.name === 'platform_account' &&
    context.role !== 'root' &&
    String(row.identity ?? '') !== context.accountIdentity
  ) {
    return '普通平台管理员只能编辑自己的账户资料';
  }
  return '';
}

/** 校验每个列表型可编辑资源都有显式更新字段规则。 */
export function assertResourcePageRules(definitions: ResourceUiDefinition[]) {
  const missing = definitions
    .filter(
      (definition) => definition.pageKind === 'list' && definition.canEdit,
    )
    .filter((definition) => !pageRules[definition.name])
    .map((definition) => definition.name);
  if (missing.length)
    throw new Error(`资源缺少编辑字段规则：${missing.join('、')}`);
}